Social bookmarking is a way for users to save and share their favorite webpages, allowing them to easily access and organize their bookmarks from any device. They are mainly used for content curation. They are especially useful for users who frequently search the internet and want to keep track of websites they find interesting or useful. Social bookmarking tools allow users to add tags (labels) to webpages in order to categorize them and make them easier to find later.
https://www.educatorstechnology.com/2014/02/10-excellent-social-bookmarking-tools.html